WO2023187231A1

WO2023187231A1 - Compact electromechanical activation system for a lift safety device

Info

Publication number: WO2023187231A1
Application number: PCT/ES2022/070323
Authority: WO
Inventors: Francisco de Asís MATEO MUR
Original assignee: Dynatech, Dynamics & Technology, S.L.
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2023-10-05
Also published as: EP4276046A1

Abstract

The present invention relates to an activation system comprising: - A fixed protection plate (10) on which actuation means based on a reset coil (1) and a retaining coil (2), as well as release means in an aligned arrangement are attached. - Movable wedge means activated by the actuation means and wherein these movable wedge means are in a parallel arrangement with respect to the actuation means. - One or two wedge rollers (6) depending on whether it is for a one-way safety device system or for a two-way safety device system, respectively, A compact system that can adapt to existing safety devices is achieved. The electromechanical actuation is executed vertically, which dispenses with additional levers, decreases susceptibility to failure and means that the reset and retaining coils are smaller.

Description

COMPACT ELECTROMECHANICAL ACTIVATION SYSTEM FOR AN ELEVATOR PARACHUTE

DESCRIPTION

OBJECT OF THE INVENTION

The object of the present invention, as the title of the invention establishes, is a compact electromechanical activation system for the parachutes of an elevator, forming a set of small dimensions for the emergency stop of an elevator and which acts as an interface between a system electronic overspeed detection and an element responsible for stopping the elevator car in case of emergency.

The present invention is characterized by the special configuration and design of each of the parts of the mechanism so that the positive safety electromechanical drive is achieved in a small volume, making it possible to mount it inside the frame beam, without it protruding from the beam. of the same.

The electromechanical activation system comprises a parachute protection plate that incorporates all the electromechanical actuation elements in a vertical position for an elevator parachute, of any type, progressive unidirectional, bidirectional, or even instantaneous.

This vertical arrangement and configuration of elements on the protection plate itself makes the assembly compact enough so that the parachute assembly and its electromechanical actuation can be accommodated within the spar of the elevator frame. Therefore, the present invention is limited within the field of elevators, and particularly among the safety means used to stop an elevator.

BACKGROUND OF THE INVENTION

There are electromechanical parachutes on the market that are certified and functional. These safety gears must be used in conjunction with electronic limiters which in turn are absolute position sensors. These electronic limiters replace conventional mechanical limiters, as well as the limiter cable and its tensioning pulley.

In conventional mechanical systems, it is the limiter cable that activates the parachute system. In the case of electronic systems, it is an electromechanical activation system that is responsible for activating the parachute. As mentioned previously, a spring is responsible for keeping the parachute in the activation position and a coil is responsible for keeping the parachute in the non-activation position.

The activation assembly currently used consists of the use of a reset coil, a retention coil in association with a spring that remains preloaded during normal operation waiting to be deployed in the event of a power failure, and means for transmitting the actuation towards the coining roller.

Said means of transmission of the action of the parachute to the coining roller are based on the use of levers and cams, which results in an increase in the necessary final dimensions, causing the electromechanical activation system to come out of the stringer where is mounted. This part of the activation occupies a space in the chassis that in some cases can be a problem since it can collide with some other element of the installation. In turn, it can be a problem for the customer because it forces them to modify their chassis. On the other hand, the existing electromechanical parachutes and drives are complex in their conception and manufacturing, and they also require coils with greater dimensions and power.

Therefore, it is the object of the present invention to overcome the drawbacks of the state of the art, developing a compact electromechanical activation system for an elevator parachute that has a reduced final volume, usable in any type of parachute, given its versatility, developing a compact set like the one described below.

DESCRIPTION OF THE INVENTION

The object of the present invention is a compact electromechanical activation system or device, with positive safety, for elevator parachutes that have reduced dimensions, configuring an emergency stop device for an elevator that is based on the use of drive means. in association with mobile wedging means that translate the drive into wedging a roller on a guide.

The drive means are preferably based on a coil, which is a retention coil, which is preferably a suction cup-type coil, which at the moment of activating the stop stops receiving current, which causes the movement of mobile means. of wedging of one or more interlocking rollers so that they are positioned so as to produce the wedging of a guide.

The drive means and the mobile wedging means are aligned parallel and positioned parallel to the elevator guide so that, once the drive means are activated, the mobile wedging means move, dragging a roller in their movement. coinage. The compact electromechanical activation system for an elevator parachute comprises:

A fixed protection plate on which actuation means based on a reset coil and a retention coil and release means are fixed in an aligned arrangement.

Mobile wedging means activated by the drive means and where these mobile wedging means are in parallel arrangement in relation to the drive means.

One or two wedging rollers, depending on whether it is for a unidirectional parachute system or for a bidirectional parachute system respectively.

Where all the previous means are arranged in the same vertical of a parachute, eliminating additions that increase the volume and complicate the installation.

The compact electromechanical activation system for elevator parachutes, in the case of being used in unidirectional parachutes, has the following particularities.

The fixed protection plate is provided with a double bend defining an upper part and a lower part, so that in the upper part the reset coil and the retention coil are fixed, separated from each other, with a coining spring so that, once the retaining coil is released from its feed, the drive spring moves vertically.

The mobile wedging means consist of a mobile protection plate placed in a parallel arrangement with respect to the lower part of the fixed protection plate, where said mobile protection plate has an upper bend that defines a horizontal surface (19), this horizontal surface being housed between the space defined by the coil rearm and the retention coil, while in the vertical section it has a coliseum.

The coining roller is arranged at the bottom of the fixed protection plate, where said coining roller has a guiding axis that emerges through a guiding groove made in the fixed protection plate.

Furthermore, it has means for guiding the mobile protection plate with respect to the fixed protection plate for the vertical movement of the mobile protection plate in relation to the fixed protection plate.

The compact electromechanical activation system for elevator parachutes, when used in bidirectional double roller parachutes, greatly reduces the need for leverage, when compared to other state-of-the-art solutions. This design has the following particularities:

The reset coil and the retention coil consist of a double solenoid coil that is responsible for removing the rollers and maintaining them in the non-locking position. One of the solenoids is of greater power than the other and makes the initial force to remove the system and then a second solenoid of lower power retains the system indefinitely in the non-locking position.

The mobile wedging means consist of a pair of tilting levers by means of a system of pulleys and connecting ropes where one of the pulleys of the pulley system is elevated by the release means, which produces a tilting of the tilting levers and , consequently, an approach of the interlocking rollers towards the elevator guide. The fact of using a reset coil serves to reduce the physical requirements, that is, power and size of the retention or retention coil to be able to reset the drive, as well as consume less during the time that the spring is compressed in standby. of being released.

Thanks to the characteristics described, it is possible to develop a new electromechanical parachute design that improves existing electromechanical parachutes in the following aspects:

It is a compact activation system so it is more easily integrated into customer racks. The installation of this device does not require major modifications.

It is a system adaptable to elevator parachutes regardless of their type, unidirectional, bidirectional, progressive or instantaneous.

Electromechanical elements of greater power can be used due to effort requirements, since the entire height of a beam is available and other elements of the elevator are not involved.

The electromechanical actuation is executed vertically, which saves additional levers, compared to other configurations and, therefore, the transmission of force is direct, without any loss due to the aforementioned lever.

Unlike electromechanical parachutes that operate using extensive levers, activation is direct since everything is located vertically of the parachute itself. A mobile protection plate is responsible for positioning the actuation roller in the different states.

By carrying fewer levers, joints, etc. The susceptibility to failure is lower, since fewer parts are used. The fact of carrying fewer parts also influences the assembly of the product in the workshop, as well as its installation on the frame.

The reset and retention coils are smaller than those of an electromechanical lever parachute since it requires less force if the action is direct. The coils, being smaller, consume less, making it a somewhat more efficient system than the previous ones.

The activation system is applicable to: o Instantaneous parachutes o Unidirectional progressive parachutes o Bidirectional progressive parachutes (double roller or shoe) o Bidirectional progressive parachutes (single roller or shoe)

Unless otherwise indicated, all technical and scientific elements used herein have the meaning normally understood by a person skilled in the art to which this invention belongs. Procedures and materials similar or equivalent to those described herein may be used in the practice of the present invention.

Throughout the description and claims the word “comprises” and its variants are not intended to exclude other technical characteristics, additives, components or steps. For those skilled in the art, other objects, advantages and features of the invention will emerge partly from the description and partly from the practice of the invention.

EXPLANATION OF THE FIGURES

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, in accordance with a preferred example of practical embodiment thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented:

In Figure 1, we can see a front view of the state-of-the-art unidirectional electromechanical drive assembly. In Figure 2, we can see the rear view of the same previous assembly of the state of the art.

In Figure 3 you can see an electromechanical activation system for unidirectional parachutes where the mobile protection plate has been removed.

In Figure 4 you can see different views of the activation system in the roller locking position.

In Figure 5 you can see different views of the activation system in the non-locking position of the roller.

Figures 6A and 6B show a front and rear view respectively of an electromechanical activation system for a bidirectional parachute in the pre-locking position.

Figures 7A and 7B show a front and rear view respectively of an electromechanical activation system for a bidirectional parachute in the non-locking position.

Figures 8A and 8B show a front and rear view respectively of an electromechanical activation system for a bidirectional parachute in the wedged position.

Figures 9A and 9B show the front and rear views of the electromechanical activation system for a bidirectional parachute where the details of the system of the mobile wedging means, the tilting levers and the system of pulleys and connecting wire ropes can be seen. .

Figure 10A shows the compact electromechanical activation system for instantaneous unidirectional parachutes. Figure 10B shows the compact electromechanical activation system for locked instantaneous unidirectional parachute.

Figure 10C shows the compact electromechanical activation system for unlocked instantaneous unidirectional parachute.

PREFERRED EMBODIMENT OF THE INVENTION.

In view of the figures, a preferred embodiment of the proposed invention is described below.

In Figures 1 and 2 we can see a state-of-the-art unidirectional electromechanical parachute in a front and rear view respectively.

Said parachute comprises a reset coil (1) that compresses an activation spring (8) of the coining, on a retention coil (2) fixed on a support (3), where once the spring is compressed it is the retention coil itself. (2) the one with the activation spring (8) retained waiting to be activated by the loss of power to the retention coil (2). The displacement of the activation spring (8) is controlled by an inductive monitoring sensor (4).

In Figure 2, which shows the rear face, it can be seen how the displacement of the activation spring (8) is transmitted to a wedging roller (6) through a series of levers (7) in association with a limit switch ( 5), the mechanical parachute (9) being visible on said rear face.

Figures 3 to 5 correspond to a first embodiment where different views and states of the compact electromechanical activation system for unidirectional elevator parachutes are shown. As seen in Figure 3, the system comprises a fixed protection plate (10) provided with a double bend defining an upper part and a lower part, so that a reset coil (1) is fixed to the upper part. and a retention coil (2) in an aligned arrangement and separated from each other, an activation spring (8) being arranged on the retention coil (2), so that the retention coil (2) is released from its power supply by the spring. drive moves vertically.

In the lower part of the fixed protection plate (10) a coining roller (6) is housed (figures 3 and 4) whose guiding axis (17) emerges through a guiding groove (12) made in the plate. fixed protection (10).

In Figures 4 and 5 you can see the electromechanical activation system provided with a mobile protection plate (13) that has an upper bend (18) that defines a horizontal surface (19), this horizontal surface (19) being housed between the space defined by the reset coil (1) and the retention coil (2).

The mobile protection plate (13) has guiding means for its vertical movement in relation to the fixed protection plate (10), for this purpose, on the fixed protection plate (10) there are arranged, in the shown embodiment, three guiding pins (11), while in the mobile protection plate there is a first guiding groove (14) through which a guiding pin (11) runs and a second guiding groove (15) through which two guiding pins run. (11), said guide slots (14) and (15) having a vertical arrangement in order to produce a vertical displacement of the mobile protection plate (13).

Furthermore, said mobile protection plate (13) has a slot (16) with a section comparable to a trapezoid in order to guide the movement of the coining roller (6) along the guide groove (12) by means of the guiding shaft (17) of the coining roller. Figure 4 shows the locking position, where the retention coil (2) is deactivated, the activation spring (8) is released, producing the elevation of the mobile protection plate (13) by means of the horizontal surface (19). and consequently the elevation and outgoing movement of the coining roller (6).

Figure 5 shows the position of the activation system in operating position, waiting to be activated where the activation spring (8) is compressed thanks to a first actuation of the reset coil (1) and subsequent actuation of the retention coil (2), leaving the mobile protection plate (13) in its lower position and, consequently, the coining roller is also in its lower position and without protruding laterally.

Figures 6A, 6B, 7A, 7B, 8A and 8B show the front and rear view of an electromechanical activation system in a second embodiment and which corresponds to a pre-locking, non-locking and wedging position respectively of a bidirectional parachute.

In these figures you can see the fixed protection plate (10) where the actuation means consisting of the reset coil (1) and the retention coil (2) are mounted, which in this embodiment is a double solenoid coil. . Also, on said fixed protection plate (10) there are mobile wedging means (20) activated by the drive means and where these mobile wedging means are in parallel arrangement in relation to the drive means.

The drive means are in connection with a release means that in the shown embodiment consists of a vertically movable core (26) that at its lower end is in connection with a vertically movable pulley (25) of a pulley system (24). , as seen in figures 9A and 9B. The mobile wedging means (20) comprise two tiltable levers (23) with respect to an intermediate point of their length and which at the free ends have respective connecting arms (27), which in turn these connecting arms are joined by by means of a discrimination lever (28), with the coining rollers (6) mounted on the ends of the connecting arms (27). Furthermore, said tilting levers (23) are linked to each other by means of an approach spring.

(29) fixed at their ends at the tilting or rotating points of the tilting levers (23).

In these figures it can be seen how the bidirectional parachute (21) and the guide (22) of the elevator are contained in the same vertical plane of the electromechanical drive system that is the object of the invention.

The mobile wedging means (20) are driven by a system of pulleys (24), which comprise a vertically movable pulley (25), two first auxiliary pulleys (31), a second auxiliary pulley (32) and a wire rope.

(30) that runs through said pulleys and whose ends are attached to the points of articulation or rotation (33) of the tilting levers (23), so that once the retention carried out by the retention coil (2) is released, the lifting occurs. of the moving core (26) and therefore that of the moving pulley (25) vertically, which results in a tilting of the tilting levers (23) and consequently the approach of the coining rollers (6). That is, both rollers touch the guide (22), however, if the elevator car were to move downward, then the lower roller would become wedged. If the cabin moved up, then the top roller would wedge.

In figures 10A, 10B and 10C, you can see the previously described elements corresponding to a compact electromechanical activation system for instantaneous unidirectional parachutes, where you can see the protection plate (figure 10A), the blocked system (figure 10B) and he system unlocked (10C). Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is stated that, within its essentiality, it may be put into practice in other embodiments that differ in detail from that indicated by way of example. , and to which the protection sought will also reach, as long as it does not alter, change or modify its fundamental principle.

Claims

1.- Compact electromechanical activation system for an elevator parachute characterized in that it comprises

A fixed protection plate (10) on which actuation means based on a reset coil (1) and a retention coil (2) and release means are fixed in an aligned arrangement.

One or two wedging rollers (6) depending on whether it is for a unidirectional parachute system or for a bidirectional parachute system respectively.

2.- Compact electromechanical activation system for an elevator parachute characterized by:

The fixed protection plate (10) is provided with a double bend defining an upper part and a lower part, so that the reset coil (1) and the retention coil (2) are fixed in an aligned arrangement on the upper part. and separated from each other, an activation spring (8) being arranged on the retention coil (2), so that once the retention coil (2) is released from its power, the actuation spring moves vertically.

The mobile wedging means consist of a mobile protection plate (13) placed in a parallel arrangement with respect to the lower part of the fixed protection plate (10), where said mobile protection plate (13) has an upper bend that defines a horizontal surface. (19), leaving this horizontal surface housed between the defined space by the reset coil and the retention coil, while in the vertical section it has a gap (16).

The coining roller (6) is arranged in the lower part of the fixed protection plate (10), where said coining roller has a guiding axis (17) that emerges through a guiding groove made in the plate. fixed protection.

In addition, it has means for guiding the mobile protection plate (13) with respect to the fixed protection plate (10) for the vertical movement of the mobile protection plate in relation to the fixed protection plate.

3.- Compact electromechanical activation system for an elevator parachute according to claim 1, characterized in that the guiding means for the vertical displacement of the mobile protection plate (13) in relation to the fixed protection plate (10) comprise three pins. guide (11) arranged in the fixed protection plate (10), while in the mobile protection plate there is a first guiding groove (14) through which a guiding pin (11) and a second guiding groove (11) run. 15) through which two guiding pins (11) run, said guiding slots (14) and (15) having a vertical arrangement in order to produce a vertical displacement of the mobile protection plate (13).

4.- Compact electromechanical activation system for an elevator parachute according to claim 2 or 3, characterized in that the tailpiece (16) of the mobile protection plate (13) has a configuration comparable to a trapezoid.

5.- Compact electromechanical activation system for an elevator parachute according to claim 1 characterized in that: The reset coil (1) and the retention coil (2) consist of a double solenoid coil that is responsible for removing the rollers and keeping them in the non-locking position where one of the solenoids is of greater power than the other and makes the initial force to remove the system and then a second, lower power solenoid holds the system indefinitely in the non-locking position.

The mobile wedging means consist of a pair of tiltable levers (23) by means of a system of pulleys (24) and connecting ropes where one of the pulleys of the pulley system is elevated by the release means and which produces a tilting of the tilting levers and consequently an approach of the locking rollers towards the elevator guide.

6.- Compact electromechanical activation system for an elevator parachute according to claim 5 characterized in that the mobile wedging means are in connection with release means that consist of a movable core (26) that at its lower end is in connection with a vertically movable pulley (25) of the pulley system (24).

7.- Compact electromechanical activation system for parachutes of an elevator according to claim 5 characterized in that the mobile wedging means (20) comprise two tiltable levers (23) with respect to an intermediate point of its length and that at the free ends have respective connection arms (27), which in turn these connection arms are joined by means of a discrimination lever (28), leaving the wedge rollers (6) mounted on the ends of the connection arms (27), Furthermore, said tilting levers (23) are joined together by an approach spring (29) fixed at their ends at the tilting or rotating points of the tilting levers (23).

8.- Compact electromechanical activation system for parachutes of an elevator according to claim 6 or 7 characterized in that the pulley system (24) comprises a vertically movable pulley (25), two first auxiliary pulleys (31), a second auxiliary pulley ( 32) and a cable (30) that runs through said pulleys and whose ends are attached to the points of articulation or rotation (33) of the tilting levers (23), so that the retention made by the retention coil (2) is released. ) the lifting of the movable core (26) and therefore that of the movable pulley (25) occurs vertically, which results in a tilting of the tilting levers (23) and consequently the approach of the coining rollers (6). .